Stop and waste valve



(No Model.)

P. HARVEY.

STOP AND WASTE VALVE.

Patented Nov 3, 1885.

Lnveuior 2 Um. SA 7;

1/4 m I 9 1 m 1, m5

UN TED STATES PATENT @rrrca PATRICK HARVEY, or CHICAGO, ILLINOIS.

STOP' AND WASTE VALVE.

EaPECIEICATICZI forming part of Letters Patent No. 329,736, datedNovember 3, 1885.

Application filed December 1, 1884. Serial No. 149,243. (No modcli) Toall whom it may concern.-

3e it known that I, PATRICK HARVEY, a cit zen of the United States, andresiding at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and use ful Improvements in Stop and \Vaste Valves,of which the following is a full and complete description.

The purposes of this invention are to provide asa stop and waste valve abalanced valve which shall therefore require to actuate it in eitherdirection only sufficient force to overcome the friction and inertia ofits parts, to provide, in connection with such stop and waste valve, anautomatic check against the return of gas and sewage, such check to beconnected and made as a part of such stop and waste valve, and the wholeso arranged that all the valves, including the check, may be withdrawnfrom above for repairs, 850., without digging up the shell or in any waydisturbing its connections.

It consists, as means for the accomplishment of these purposes, of acylindrical shell having lateral induction and eduction ports, apiston-rod playing longitudinally through the cylinder, having two orthree equal valves or pistons rigid with it, one of which closes awaste-port in the cylinder, said piston-stein havlng the waste-ductthrough it, and provided with a suitable check-valve closing inward.

The drawing is a vertical section of my invent-ion in a preferred form.I

A is the shell, having the induction-port A, the eduction-port A thecylindrical seats A A", and A B is thepistonrod, having, as shown, threepistonheads, B, B and B though the heads B and B may be considered asconstituting but one, whose length is the entire distance irom theiropposite edges. I prefer the form shown,for the convenience therebyafforded in Inserting the rubber rings Z), which serve as packing. Thepiston-rod B has the central longitudinal duct, 0, which extends fromthe lower end of said piston-rod to the cage B, and which serves as awaste passage, as hereinafter explained.

D is a check-valve closing the upper end of the duct 0. It is retainedin proximity to its seat by the cage B, to the upper end of which therod B is attached, which extends thence up to any point convenient foractuating it by connection with a lever, as hereinafter explained. Therod B is inclosed to the surface of the ground by the pipe 0, screwedonto the upper end of the shell A, outside the cage 13*. It ispreferably inclosed at the upper end by the cap E, which is pierced forthe rod B and is preferably provided with the ear E, in which is thefulcrum of the lever E, which passes through a slot in the rod B and isprovided on its free arm E with a weight adjustable and sufficient toovercome the friction of the valves and cause the piston to drop whennot sustained,as provided by the cord F, which extends from the free endof the lever E to any convenient point, where is fixed the half-sheave Eon the plate F which has the stop F and the notch E co-operating,respectively, with the tooth F and the latch F on the sheave, thestop-tooth limiting the motion of the cord, and so of the lever when itdescends, and the latch by engaging in the notch keeping the cord woundup and the lever raised when the valve is desired to be kept open. Thedistances between and the lengths of the several valves with relation tothe lengths of and distances between their respective seats are suchthat when the piston-rod is at its lowest point the valve B is below itsseat A The valves B and B together act as one valve in effect and closethe induction-port A, the pressure upon the valves, both from the supplyand from the service pipes, being balanced. In this position there isfree communication from the service-pipes through the eduction-port Athe waste-port A, and the waste-duct O. WVhen the piston-rod is raised,the valve B reaches and covers its seat, closing the waste-port A beforethe valve 13 is off its seat A. In this position both the induction andeduction ports are closed against any communication between them, orbetween either of them and the waste-port, and the pressure of both thesupply and service water is balanced upon the piston-stem. As the pistonis further raised the eduction-port is uncovered by the piston B andcommunication is established between the induction and eduction ports,the waste-port remaining closed by the valve 13,

IOC

which thus is never raised above the upper edge of its cylindrical seatA except when being removed for repairs. In this position, also, thepressure is balanced and the piston has no tendency to move except ascaused by its weight, or the weight of its connections. It will be seenthat at no time can there be direct communication between theinduction-port and the supply-pipe and the waste port and pipe. Thecheck-valve will be seated by any back-pressure or flow of gas or water,and so will prevent sewage or gas reaching the service-pipes when thewaste is open and the supply closed. It will be seen that the locationof the waste-duct through the stem and the location therein of thecheckvalve D renders possible the removal of all the valves at once byWithdrawing the piston from above, which can be done by removing thecap, while the general structure offers the advantage of permitting suchremoval from above without disturbing the shell or any of itsconnections, which are usually under ground. The balanced character ofthe valve renders the use of aweight unnecessary whenever. the situationwill permit the use of a rigid rod, instead of a cord, to connect thele- I ver E to the point at which it is to be operated.

It will be observed,as an element of the construction of both forms,that the valve or piston B is never ofi' its seat A but in all positionsof the valve-stein remains as a partition, cutting off communication,outside of the valve-stem, from the induction or eduction ports to thewaste-port, and that the duct 0, penetrating the transverse plane ofsaid piston B is thus made the only avenue of communication from thewaste-port on one side of that plane to the eduction-port on the otherside; and however much the arrangement of the several valves, ports, andseats may be varied to accomplish subordinate results, this feature mustbe retained in order to force the waste to pass in some part of itscourse through the stem, so that it may be possible to locate in thestem the mechanism to control either the outflow or back-current ofwaste or sewage or gas.

Certain specific modifications of this invention are shown and describedin my pending applications, No. 153,964 and No. 153,965, filed January26, 1885, and I do not herein claim those forms specifically, thoughthey are included in the generic invention herein claimed.

I claim- 1. In a stop and waste valve, the valve-stem having thewaste-duct located therein, in combination with an automatic check-valveseat- 1 ing inward to close said duct in the stem and opening in thedirection of the waste-outflow through said duct, substantially as setforth.

2. In a stop and waste valve, in combination, the valve-shell havinginduction, eduction, and waste ports, and a cylindrical seat between theinduction and eduction ports upon one hand and the waste-port upon theother hand, the valve-stem having a valve to close the induction-port,and another to close the waste-port, and a third valve or piston rigidwith it and adapted to said cylindrical seat, and a duct within itopening to its surface beyond said last-named valve or piston in thedirection of the waste-port, said piston.

being located to be in contact with said cylindrical seat throughout theentire stroke of the close the induction-port and another to close thewaste-port, and a third valve or piston rigid with it, adapted to saidcylindrical seat, and a duct opening to its surface beyond said pistonin the direction of the waste-port, and

a check-valve in said duct and adapted to close the same by seatinginward, said piston being located to be in contact with its saidcylindrical seat throughout the entire stroke of the valve-stem,substantially as and for the purpose set forth.

4. In a stop and waste valve, in combina tion, substantially as setforth, the valve-shell having the induction, eduction, and. waste ports,the valve-seats A A, and A of uniform diameter, the valve-stem havingthe piston valves B, B and B of uniform diameter, and the centralwaste-duct, and the automatic check-valve D, seating inwardly to closesaid duct, substantially as set forth.

5. The valve-shell A, with its ports and valve-seats, the valve-stem B,with its pistonvalves and interior waste-duct, the checkvalve D, adaptedto close said duct by seating inwardly, and the cage B, retaining saidcheckvalve and forming the connection between the valve-stem and itsactuating-rod, substantially as set forth.

In testimony whereof I have hereunto set my hand, in the presence of twowitnesses, at Chicago, Illinois, this 21st day of November, A. D. 1884..

PATRICK HARVEY.

Attest:

FRANCIS W. PARKER, CHAS. S. BUR'ION.

